No one can install the docker image until the Lisk devs get their act together.
If you have an extra Raspberry Pi laying around, use that. That is what did. I didn't want to deal with updating from the testnet so I just burned a new image of Raspian Lite, ran through the pre-setup scripts, and installed from binary. You can probably avoid the Raspberry Pi and just use a VirtualBox virtual machine and achieve the same results. Before getting upset remember that this is a platform that is being targeted at software/web engineers, so be prepared to get your hands dirty on day one. If you can't do that it's probably best to wait until someone puts together an easier method to get up and running